The Ultimate Test
Ace Your Next Technical Job Interview
Angie Jones
http://angiejones.tech
@techgirl1908
Senior Automation Engineer
Twitter, San Francisco, CA, USA
T.J. Maher
Adventures in Automation
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Testing Round
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How would you test a chair?
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Automation Round
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Automation Pyramid
UI
SERVICES
UNIT
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Unit Tests
public int add(int a, int b);
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Service Tests
Given a user profile, how would you test
CRUD operations of a REST API?
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| CRUD | REST Methods | Tests |
|---|---|---|
| create | post | |
| read | get | |
| update | put | |
| delete | delete |
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| CRUD | REST Methods | Tests |
|---|---|---|
| create | post | post with all optional and required data post with only required data post with required data missing post with invalid data for the parameters |
| read | get | |
| update | put | |
| delete | delete |
@techgirl1908
| CRUD | REST Methods | Tests |
|---|---|---|
| create | post | post with all optional and required data post with only required data post with required data missing post with invalid data for the parameters |
| read | get | get when profile doesn't exist get when profile exists create profile then get update profile then get delete profile then get |
| update | put | |
| delete | delete |
@techgirl1908
| CRUD | REST Methods | Tests |
|---|---|---|
| create | post | post with all optional and required data post with only required data post with required data missing post with invalid data for the parameters |
| read | get | get when profile doesn't exist get when profile exists create profile then get update profile then get delete profile then get |
| update | put | update existing profile update non-existing profile update deleted profile update then update again |
| delete | delete |
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| CRUD | REST Methods | Tests |
|---|---|---|
| create | post | post with all optional and required data post with only required data post with required data missing post with invalid data for the parameters |
| read | get | get when profile doesn't exist get when profile exists create profile then get update profile then get delete profile then get |
| update | put | update existing profile update non-existing profile update deleted profile update then update again |
| delete | delete | delete profile delete when there are dependencies delete after delete delete non-existing |
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UI Automation
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/html/body/div/div/div/div/div/div[2]/label/span[2]
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.//span[contains(@class, 'PollXChoice-choice--radio')]/span[text() = '%s']
Development Round
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Brush up on...
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- Big O Notation
- Data Structures
- Algorithms
Big O Notation
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| Notation | Description | Example |
|---|---|---|
| O(1) - Excellent | performance of execution is the same regardless of the input set | insert, delete, search Hash table |
| O(log N) - Good | high performance at beginning but flattens as the size of the data set increases | binary search |
| O(N) - Fair | performance will deteriorate in direct proportion to the growth of the input set | loop through List to find value |
| O (N log N) - Bad | O(N) * O(log N) - task takes O(log N) and has to be repeated O(N) times | sorting |
| O(N^2)- Horrible |
performance will deteriorate in direct proportion of 2 times the data set | nested loops N^2 is for 2 nested loops N^3 is for 3 nested loops |
| O(2^N) - Horrible | number of calls inside function x number of times function will be called | recursive function with multiple calls (i.e fibonacci recursion) |
Data Structures
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| Structure | Description |
|---|---|
| Hash Table | maps keys to values |
| Stack | line of data. last in, first out |
| Queue | line of data. first in, first out |
| Linked List | sequence of nodes where each node points to next node |
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Instructions: 2 arrays. Print any that appear in both
Example:
a1 = {'a', 'b', 'c'}
a2 = {'b', 'c', 'd'}
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Instructions: 2 arrays. Print any that appear in both
Example:
a1 = {'c', 'a', 'b', 'c'}
a2 = {'b', 'c', 'd'}
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Instructions: 2 arrays. Print any that appear in both
Example:
a1 = {'c', 'a', 'b', 'c'}
a2 = {'b', 'c', 'd'}
Expected Result: {'c', 'b'}
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Instructions: 2 arrays. Print any that appear in both
Example:
a1 = {'c', 'a', 'b', 'c'}
a2 = {'b', 'c', 'd'}
Expected Result: {'c', 'b'}
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Instructions:
Given a list of Strings and a specific String, find out many times the String appears in the list
Example:
l = {"abc", "def", "abc", "ghi"}
s = "abc"
output = 2
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Instructions:
Given a list of Strings and a specific String, find out many times the String appears in the list
Example:
l = {"abc", "def", "abc", "ghi"}
s = "abc"
output = 2
Studying
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by Gayle McDowell
Resources
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Good luck!
Angie Jones
http://angiejones.tech
@techgirl1908
Senior Automation Engineer
Twitter, San Francisco, CA, USA